Sebastien De Chaunac defeated Melvyn Op Der Heijde 6-2 6-4 in the Great Britain F5 qualifying round on clay. The upset overturned the form book — Melvyn Op Der Heijde came in leading the head-to-head 1–0, but Sebastien De Chaunac had been the form player, winning 4 of their last 7 on clay. Sebastien De Chaunac claimed a first win over Melvyn Op Der Heijde in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-06-07 | Germany F5 | R32 | clay | Melvyn Op Der Heijde | 7-5 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.